Drill Upgrades — Costs, Rarities and Which Cards to Buy

How the upgrade shop works

Drill upgrades belong to the drill machine, not to you. They improve the team’s wall damage, speed, fuel capacity and defensive stats, and they are bought with Coins during a descent — not with Cores.

Every roll offers four cards: three you can buy with Coins and one that costs Robux. A Coin-only player therefore picks from three options each time, which is why knowing what you want matters more here than in a shop with a full inventory.

Purchasing has a cost curve. Each buy raises the price of that rarity by a fixed amount, so leaning on Commons all run gets progressively worse value:

When an upgrade rolls up a tier it also multiplies, so a Rare card is worth 2x its base effect, an Epic 3x, a Legendary 4x and a Mythic 10x — at a correspondingly higher price.

Common upgrades (100 Coins)

Rare upgrades (250 Coins)

Epic upgrades (500 Coins)

Legendary upgrades (1,000 Coins)

Mythic upgrades (10,000 Coins)

The three-card combo that breaks walls

If you only remember one thing from this page, make it this: RPM Overclock, Ultra Drill and Power Burst are the fastest boss wall break in the game, and they only work as a set.

Here is the interaction:

1. RPM Overclock increases how often the drill hits the wall. More hits means Ultra Drill stacks faster.
2. Ultra Drill adds +1 stacking damage for every hit while you drill nonstop. Left alone it ramps slowly; with RPM Overclock it ramps quickly.
3. Power Burst multiplies the damage that has accumulated. Because it multiplies rather than adds, it is worth far more after Ultra Drill has been stacking than at the start of a wall.

Use them in that order on a boss wall. Power Burst’s active window is only 5 seconds, so the play is to build stacks first, then burst.

That combination is also the answer to the HP curve: boss wall HP runs from 100 in the Grass Layer to 500,000 before the 100 km mark and 5,000,000 at the Heart of the Earth. No amount of combat damage keeps up with that. The layers page has the full HP table, and the 100 KM plan shows where these three cards decide a run.

Where your Coins should go

For a first run, buy Drill Power and Fuel Storage. They are 100 Coins each and they fix the two problems beginners actually have.

Once you are clearing layers reliably, save for the Epic tier rather than buying every Common that appears. Power Burst is the single most valuable card in the shop, and RPM Overclock is close behind.

One more thing worth knowing: Money Drill pays +10 Coins per wall broken. Little and Large Walls appear every 700 m to 1 km, so a deep run breaks a lot of walls — which makes Money Drill an economy card disguised as a drill upgrade. It is a reasonable buy if you are saving for something expensive.

If you are still working out what to spend lobby currency on, how to get Cores covers the earning side and all classes covers the prices.